Fixture tool, assembling table, substrate assembly and assembling method and fixing method of substrate assembly

The invention provides a clamp tool, an assembling table, a substrate assembly and an assembling method and a fixing method of the substrate assembly. Wherein the clamping tool comprises a first clamping tool frame part, a second clamping tool frame part and a wedge block, and the first clamping tool frame part and the second clamping tool frame part can be assembled to form a clamping tool frame main body; the wedge block is detachably connected with the first clamp frame part and the second clamp frame part; the first clamp frame part and the second clamp frame part are used for being attached to the two opposite sides of the base plate in the assembling process. The fixture frame main body is arranged around the substrate; the wedge block is used for extending into the side wall groove of the base plate in the assembling process, and a gap is formed between the matching end face of the wedge block and the matching end face of the side wall groove of the base plate. By means of the clamping tool, zero edge