W-Ti［w（Ti）=10%］ alloy was prepared， and the influence of powder purity and W powder size on the density and microstructure of W-Ti［w（Ti）=10%］ alloy was studied. It is found that the higher the purity of powder， the higher the density of W-Ti［w（Ti）=10%］ alloy， and the lower the Ti rich phase proportion. The W-Ti［w（Ti）=10%］ alloy with 3N purity will retain pure Ti， and the proportion of Ti-rich phase is 31.28%. The W-Ti［w（Ti）=10%］ alloy with 4N and 4N5 purity does not have pure Ti， and the proportion of Ti-rich phase is 28.41% and 21.67%， respectively. The influence of W powder particle size is reflected in two aspects： the larger the W powder particle size， the better the mixing effect with Ti powder， the more conducive to diffusion； but the smaller the specific surface area， the less conducive to diffusion. With the increase of W particle size， the Ti-rich phase content of W-Ti［w（Ti）=10%］ alloy decreases first and then increases. In this experiment， when the particle size of W powder is 4~5 μm and the particle size of Ti powder is 44 μm， the microstructure properties of W-Ti［w（Ti）=10%］ alloy are the best， and the proportion of Ti-rich phase is 28.79%.