Hot rheologic deformation puller to fabricate vitreous three-way microchannels with round cross sections was designed. In the forming process of the three-way microchannels

the tip of the bended glass capillary with the shape of “V” is softened by heating

and then pulled into three-way microchannels in the process of cooling. Reservoirs which connect the microchannels with conical pipes form during the pulling process. The three-way microchannels with both equal or unequal inner diameter can be made by the puller. The temperature in the heating field can be controlled by heating time. The inner diameter of the microchannels can be controlled by pulling distance. The distribution coefficient of the vitreous material can be adjusted by micro-feed mechanism. The prepared three-way microchannels has better flatness

so that the microchannel network can be assembled expediently. The inner diameter of the microchannels are micron-sized

the internal surface of the three microchannels connect smoothly in the joint. High quality surface of the microchannels are obtained due to the surface tension. The microchannel networks were assembled with the one-dimension microchannels and the three-way microchannels. The microchannels are made by the puller with Non-IC technology

the whole process is simple and cheap. The puller has no special requirement of working environment

common analytical laboratory is acceptable.