A groove type graphite boat comprises a plurality of W-shaped bidirectional inclined grooves with opposite two groove surfaces and bottom support protrusions, a bottom surface, an upper end surface, an inner side surface, an outer side surface and a lip opposite to the upper end surface. At least one exhaust passage groove is respectively designed on the opposite two groove surfaces, and an edge protection groove is respectively designed at the intersection of the bottom support protrusion and the opposite two groove surfaces. The bottom surface is designed with a through groove parallel to the W-type bidirectional chute and having an approximate Λ shape in cross section at the lower part of the protrusion formed by any two adjacent W-type bidirectional chute. The utility model makes the cemented carbide strip and sheet products uniformly degummed in the process of hydrogen degumming and vacuum sintering, avoids product warping and deformation, and has large product loading capacity and less consumables.