The invention discloses a method for preventing evaporative pattern casting blind hole crush, which comprises steps of: putting dry sand of a sand box which is compacted into an evaporative pattern mould of a blind hole, horizontally putting a member into the evaporative pattern mould with horizontal blind holes and inclined blind holes and near to the lower part; adding dry sand to an extractionend member and compacting dry sand; putting a layer of dry sand in the mould with vertical blind holes, simultaneously putting an I-shaped member, and then adding and compacting dry sand till the whole evaporative pattern blind holes is externally and internally filled with dry sand; leaving a white foam straight pouring gate between the evaporative pattern mould and the top surface of the dry sand; sealing the top of the dry sand of the sand box with a plastic film, laying a water pouring cup, opening a vacuum pump to cause the negative value to reach technology required value and casting, finally obtaining formed blind hole casting. The practical problem of the evaporative pattern casting blind hole crush is completely solved by putting the member or the I-shaped member with supporting or hanging type sand function into the evaporative pattern casting blind hole. The method is suitable for blind hole casting processing of deeper large-scale members.