The invention discloses a method for coating and sealing a fracture of a bed rock in uncovered heavy consolidation grouting. The method comprises the steps of: firstly cleaning to remove impurities in the fracture of a rock body after the evenness of a base rock body to be grouted reaches to a design requirement; then coating a cement base waterproof material on the fracture of the rock body after keeping the surface of the rock body wet for 1-2 hours; checking an appearance effect of the coating layer after the final setting time of the cement base waterproof material arrives and coating the cement base waterproof material again on the places with empty holes or fractures; and then performing pressurized-water check, marking the fractures of the rock body with water seepage and water emission, and coating the cement base waterproof material again on the fractures of the rock body until the pressurized-water check shows that the fractures of the rock body have no water leakage. The method for coating and sealing the fracture of the bed rock in the uncovered heavy consolidation grouting, disclosed by the invention, not only overcomes the disadvantages of convenient fracture processing ways such as concrete sealing, spraying thin layer structure sealing, chisel groove and caulking sealing, and bare rock without sealing, and realizes a relative good consolidation grouting effect, but also has the characteristics of being convenient and rapid in construction, low in interference, economic, safe and reliable.