This paper argued that Surigaonun morphosyntactic linearity is revealed in the textuality of Ellen Amores’ “Martsa Surigao”. The knowledge of the structure of Surigaonun language plays significant role in language learning, comprehension, formation of phrases, clauses and sentences, and effective communication using the language. Surigaonun language has no established pedagogic grammar, and there is no research conducted yet on the morphology and syntax of Surigaonun language using textuality. This study aimed to describe the morphosyntactic characteristics of Surigaonun language by analyzing the text “Martsa Surigao” to generate linguistic data on the Surigaonun word structure, the very basis for the morphemic structure of the words, which make up the constituents of the sentence. This qualitative research used the discourse analysis. Specifically, it focused on raw data idealization, morphological analysis, and syntactic analysis on immediate constituents and rewrite rules for each syntactic unit. The linear morphologic segmentation of morphemic contents of “Martsa Surigao” reveals 39 lexical phonemes of 13 simple forms and 26 complex forms; 21 grammatical morphemes of 4 prepositions, 9 pronouns, 5 conjunctions, and 3 determiners. The linear structuration of the textuality in idealized syntactic units reveals 12 simple sentences, 1 compound sentence, and 1 complex sentence according to form. Syntactically, Surigaonun sentences always begin with the predicate and end with the subject as their natural sentence patterning. Sentences are introduced by noun predicates, adjective predicates, adverb predicates, prepositional phrase predicates, intransitive verb predicates and transitive verb predicates. Therefore, the text reveals the morphosyntactic segmentation linearity in its textuality.