The invention relates to a combined type vacuum dryer belonging to production technique field of thermal sensitive material drying device, comprising a vacuum pipe type spraying drying part (A) composed of a vacuum drying pipe (6) with a steam inlet (5) and a condensing water outlet (4), and a material separating chamber (2) provided with a material inlet (1) and disposed on the vacuum drying pipe (6); a taking-in can (B) internally provided with an air suction pipe (7) with a baffle (8) and a rotational flow plate (9); a vacuum scraping plate drying part (C) composed of an internal cylinder (12) provided with a discharger opening (17) at the bottom, a jacket (13) provided with a steam inlet (11) and a condensing outlet (10) and disposed at the periphery of the internal cylinder (12), a scraping plate main shaft (15) provided with a scraping plate (14) and disposed in the internal cylinder (12), and a adjustable speed motor (16) connected with the scraping plate main shaft (15) and disposed at the bottom of the internal cylinder (12). The whole structure is designed reasonably and compactly, and the drying efficiency and product quality after drying are enhanced effectively.